Submission #462506

#TimeUsernameProblemLanguageResultExecution timeMemory
462506MounirSnowball (JOI21_ho_t2)C++14
0 / 100
15 ms412 KiB
#include <bits/stdc++.h> #define sz(x) (int)x.size() #define chmin(x, v) x = min(x, v) #define chmax(x, v) x = max(x, v) #define all(x) x.begin(), x.end() #define pb push_back #define pii pair<int, int> #define deb first #define fin second #define int long long using namespace std; const int N = 5e5, OO = 1e18; pii inters[N]; int nBoules, nJours; int getInstant(int posInter, int posBoule){ int delta = -(posBoule - posInter); int gauche = 0, droite = nJours + 1; while (droite > gauche){ int mid = (gauche + droite)/2; if (inters[mid].deb <= delta && inters[mid].fin > delta) droite = mid; else gauche = mid + 1; } return gauche; } signed main(){ ios::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); cin >> nBoules >> nJours; vector<int> boules(nBoules); for (int& boule : boules) cin >> boule; int posCur = 0; inters[0] = {0, -1}; for (int iJour = 1; iJour <= nJours; ++iJour){ int delta; cin >> delta; posCur += delta; inters[iJour] = {min(inters[iJour - 1].deb, posCur), max(inters[iJour - 1].fin, posCur)}; } // cout << getInstant(4, 3) << endl; // cout << "inter " << inters[nJours].deb << " " << inters[nJours].fin << endl; vector<pii> couverts(nBoules); for (int iBoule = 0; iBoule < nBoules; ++iBoule){ int gauche = boules[iBoule] + inters[nJours].deb, droite = boules[iBoule]; //Gauche while (droite > gauche){ int mid = floor((gauche + droite)/double(2)); /// cout << "dicho " << gauche << " " << droite << " " << mid << endl; if (getInstant(mid, boules[iBoule]) <= nJours && (iBoule == 0 || getInstant(mid, boules[iBoule]) < getInstant(mid, boules[iBoule - 1]))) droite = mid; else gauche = mid + 1; } couverts[iBoule].deb = gauche; gauche = boules[iBoule], droite = boules[iBoule] + inters[nJours].fin; while (droite > gauche){ int mid = floor((gauche + droite)/double(2)) + 1; // cout << "dicho " << gauche << " " << droite << " " << mid << endl; //cout << getInstant(mid, boules[iBoule]) << endl << endl; if (getInstant(mid, boules[iBoule]) <= nJours && (iBoule == nBoules - 1 || getInstant(mid, boules[iBoule]) < getInstant(mid, boules[iBoule + 1]))) gauche = mid; else droite = mid - 1; } couverts[iBoule].fin = gauche; cout << couverts[iBoule].fin - couverts[iBoule].deb + 1 << endl; } return 0; }
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